Snakeheads (Pisces, Channidae) PDF Download
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Author: Walter R. Courtenay
Publisher: Geological Survey (USGS)
ISBN:
Category : Nature
Languages : en
Pages : 154
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Book Description
Author: Walter R. Courtenay
Publisher: Geological Survey (USGS)
ISBN:
Category : Nature
Languages : en
Pages : 154
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Book Description
Author: Harvey B. Lillywhite
Publisher: Oxford University Press, USA
ISBN: 0195380371
Category : Nature
Languages : en
Pages : 256
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Book Description
A heavily illustrated and complete account of the functional biology of snakes, written for an audience of both scientists and a general readership.
Author: Richard Lydekker
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 658
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Book Description
Author: John E. Werler
Publisher: University of Texas Press
ISBN: 9780292793316
Category : Nature
Languages : en
Pages : 524
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Book Description
From the legendary, fear-inspiring Western Diamondback rattlesnake to the tiny, harmless Plains blind snake, Texas has a greater diversity of snake species than any other state in the country. Recognizing the public's need for a complete guide to identifying and understanding Texas' snakes, two of the state's most respected herpetologists have joined forces to create this definitive reference to all 109 species and sub-species of Texas snakes. Well-written species accounts describe each snake's appearance, lookalikes, size, habitat, behavior, feeding, and reproduction. The authors also include color photos and finely detailed line drawings to aid field identification, along with accurate range maps, a checklist of Texas snakes, a key to the species, and a brief discussion of classification and taxonomy. The authors round out this volume with essays on snake myths and misinformation, snakebite and its prevention, conservation, Texas biotic provinces, and a brief history of Texas herpetology.
Author: John George Wood
Publisher:
ISBN:
Category : Zoology
Languages : en
Pages : 830
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Book Description
Author: Tarleton Hoffmann Bean
Publisher: Рипол Классик
ISBN: 5874776524
Category : History
Languages : en
Pages : 73
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Book Description
Author: Kordell Payne
Publisher: Scientific e-Resources
ISBN: 1839474491
Category :
Languages : en
Pages : 422
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Book Description
Freshwater fish are those that spend some or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 0.05%. These environments differ from marine conditions in many ways, the most obvious being the difference in levels of salinity. To survive fresh water, the fish need a range of physiological adaptations. 41.24% of all known species of fish are found in fresh water. A fish is defined as an aquatic or marine animal with vertebrae. All fish have vertebra, except sharks and rays that have cartilage. Cartilage is more flexible than bone, but strong enough to support the body. They usually possess gills in the adult stage and have limbs in the form of fins. Fishes also include the jawless vertebrates such as the lamprey and hagfish; and the shark, ray, chimaera, lungfish, and bony fishes. The bony fishes are the most common. A bony fish has jaws that are well developed, formed by true bone rather than cartilage. Fish are very different in appearance, size and shape. This all depends on the environment that it lives in. Fish are part of the ecosystem entering the flux of energy at different levels of the food chain. This book introduces the ecology of fishes by describing the inter-relationships between fishes and the aquatic habitats they occupy. Sequential reading, chapter by chapter, covers the main themes of ecology, including habitat use, species interactions, migration, feeding, population dynamics and reproduction in relation to the major habitats occupied by fishes.
Author: John E. Fitch
Publisher: Univ of California Press
ISBN:
Category :
Languages : en
Pages : 160
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Book Description
Author: John George Wood
Publisher:
ISBN:
Category : Zoology
Languages : en
Pages : 764
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Book Description
Author: Annabel Merullo
Publisher: Weidenfeld & Nicolson
ISBN: 0297856995
Category : Travel
Languages : en
Pages : 270
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Book Description
The golden moments of exploration and adventure - glorious, triumphant, perilous and dramatic. In the 18th century, exploration entered a new dimension - explorers were motivated by scientific inquiry rather than greed. To this end they were expected to make a full record of everything they encountered; and for the first time in history, that record was to include pictures as well as words. Combining gripping first-hand accounts with original images, THE EXPLORER'S EYE gives an insight into who these people were and what they saw. They were a mixed bunch but, whatever their training or background, they provided a vivid portrait of the unknown. In the early days they drew their own pictures, later they were equipped with draughtsmen, later still they carried cameras, and ultimately they were accompanied by film crews. The power of their images is matched by that of their journals. Here you have Alexander von Humboldt braving the electric eels of South America and Robert Peary explaining his relationships with Eskimos.
